Draft-rigging.



G. B. MORSBERGER.

DRAFT RIGGING.

APPLICATION FILED 0GT.15, 1912.

Patented Sept. 2, 1913.

ATTORNEYS COLUMIHA I LANrmu/um Cn,,wAsu|NriTnN. n, c,

UNTTED dTATltid PATENT @FFTCE.

GEORGE BENARD MOESBERGEB, OF BALTIMORE, MARYLAND.

DRAZET-RIGGING.

itatentcd Sept. 2,1913.

To (all whom it may concern.

Be it known that I, Gnonun BnNAuo Monsnnnenn, a citizen of the UnitedStates, and a resident of the city of Baltimore and State of Maryland,have made certain new and useful Improvements in Draft-Rigging, of whichthe following is a specification.

My invention relates to draft rigging of the kind used upon railway carsfor the purpose of distributing strains due to abrupt changes in thetension of the draw-bar.

More particularly stated my invention comprehends a draw-bar so arrangedthat when in its normal or inactive posit-ion it is subjected to thetension of a spring, and when in active use for pulling cars the tensionupon the spring just mentioned is increased, and when the pull upon thedrawbar is excessive a portion of the strain is thrown upon additionalor reserve springs.

My invent-ion further comprehends various improvements relating tomechanism of this type for the purpose of increasing the lgeneraletliciency thereof.

Reference is made to the accompanying drawings forming a part of thisspecification and in which like letters indicate like parts.

Figure 1 is a plan view of my improved draft rigging as it appears whensubjected to excessive tension certain parts being broken away forpurposes of illustration. Fig. 2 is a longitudinal vertical sectionthrough the mechanism shown in Fig. 1 and is taken upon the line 22 ofsaid figure looking in the direction of the arrow. Fig. 3 is a sectionon the line 3-3 of Fig. 1 looking in the direction of the arrow. Fig. 4is a vertical cross section on the line H of Fig. 1 looking in thedirection of the arrow.

The draw-frame is shown at 5 and is pro vided with a buffer beam 6forming one end of the frame. Mounted within the frame and securedrigidly to the opposite sides thereof are guide beams 7 which in thisinstance are made hollow and constructed of metal. Each guide beam 7 isprovided with a slot 8 the two slots of the two guide beams facing eachother. The draw head is shown at 9 and is carried by the draw-bar 10.This draw-bar is provided with a yoke 11 of massive size and havingconsiderable strength. This yoke is provided with a slot 12 ofsubstantially the same length as either of the slots 8. Mounted withinthe draw-frame 5 and secured to the opposite sides thereof are twobrackets 13 made of metal and provided with shoulders 14 integral withthem. Each bracket 13 is provided with a slot 15, the two slots beingdisposed opposite each other in relation to the draw-frame. A tensionbar 16 extends practically across from one side of the frame to theother, the end of the tension bar extending through the slot 15. Springs17 which rest against the shoulders 14 engage the ends of the tensionbar and normally force this bar to the left according to Fig. 1, so thatone edge of the bar rests against abutting portions 18 of the bracket13, these abutting portions thus constituting limiting stops forpreventing excessive travel of the tension bar in one direction of itsmovement.

Extending loosely through the opening 12 of the yoke it are two crossbars 19 and 20 and exteni'ling from one of these cross bars to the otheris a powerful compression spring 21, the tendency of which is to force.cross bars 19 and 20 apart. Vixen the various parts are in theirrespective idle or normal positions the cross bars 19 and 20 are at theextremities of the slots 8. The draw-bar 10 carries a shoulder 22 inhorizontal. alinement with a portion of the tension bar 16. hen theparts are in their normal or inactive positions the shoulder 22 isremoved a little distance away from the tension bar 11.6, but when thereis a pull upon the draw-bar, as when the latter is used for pullingrolling stock, the shoulder 22 nears the tension bar 16 and if the pullupon the drau lmr be sulliciontly great the shoulder 22 rests againstthe tension bar 16. If now for any reason the pull upon the draw bar hestill further increased the pressure of the shoulder 29 against thetension bar 16 moves this bar outward-Aphat is to the right according toFig. 1 and so that the springs 17 are now compressed to a degreecommensurate with the strain upon them. During this time the compressionof the spring 21 is still further increased.

The operation of my device is as follows: As the car is pulled along byaid of the draw-head 9 the various movable parts above described take uppositions which are varied relatively to other parts by the degree ofstrain or tension upon the drawbar. If the load be light or for anyreason the draw-bar pull be of less degree than usual, the tensionexerted upon the drawbar is taken up by the spring 21. 1f, however thepull upon the draw-bar becomes excessive the strain is distributedsomewhat difierently. The spring 21 is compressed further in consequenceof the exeessive strain upon it, and after the strain reaches apredetermined maximum so that the shoulder 22 lodges against the tensionbar 16 and moves this bar, a portion of the excessive strain is thrownupon the springs 17. 'l Vith excessive pull upon the draw: bar thereforethe strain is divided into three factors each of which is resisted byone of the springs 17, 1 7 -21. Suppose now that in backing the trainthe direction of; strain upon the draw-bar 10 is reversed:- that is tosay, the draw-bar is subjected to a pushing rather than to a pullingaction. The draw-bar now slid-es freely through the tension bar 16 andmoves the .cross bar -20; to the left according to Fig. 1. This com:presses the spring 21 but no effect is pro-i duced upon the springs 117.

I do not limit myself to the precise con: struction shown as variationsmay h made therein Without departing from the spirit of my invention.

Having thus described my invention What I claim as new and desire tosecure byLet ters Patent is as follows:

1. A draft rigging comprising a draw frame, guide-bars connectedtherewith and provided With slots, a draw-bar extending into said drawframe and provided with a 3 yoke, cross bars extending through saidjyoke and into said slots, said cross bar-s being movable Within saidslots, a eompresq sion spring housed Within said yoke and? extendingfrom one of said cross bars to the other for the purpose of normallyforcsaid bars apart, a tension bar mounted Within said draw-frame andmovable relative-ly to the same, said tension bar being normally idle,means carried by said drawbar controllable by movement thereof in excessof a predetermined movement for 5 engaging said tension bar in order tomove the latter, and reserve springs carried by said draw-frame andengaging said tension bar for the purpose of resisting movemen s of saidtension bar.

A draft rigging comprising a draw: frame, guide bars c zriiriectedtherewith and provided with slots, a drambar extending into saiddItLWrflLlllQ and provided with yoke, cross hers extending through .Sa yke and into said s ot compr s i Spring mounted within said yoke antending from one of said cross bars to other for the purpose of tor,111g said .cnoss bars apart, a pair of brackets mounted rigidly withinsaid draw framc and provided with slots, springs mounted ithin saidbrackets, a nsion bar e ten ing through said slots in aid braekets andengaging said springs ad. in said brackets, said tension bar beingnormally idle said draw beingprovided with portion normally out ofengagement with sa d te sion harcapable of engaging said ea Sim bar when.said dl'fi'i moves beyond a predetermined limit relatively to said drawGEORGE BE'NABD 'I'ILQRSBERGER. i/Vitnesses:

WALTON HARRISON, G no, BROOK.

each, addressing the Gommissioner of-Batents, n, a a

